Reamer-head.



C. G. CASHMAN.

. REAMER HEAD.

APPLICATION FILED JULY 9, I915.

Patented May 30, 1916.

0F WAYNESBORO, PENNSYLVANIA REAMER-WD.

Specification of Letters Patent.

Patented May 3 11, 1916..

Application filed July 9, 1915. Serial n6. eases.

To all whom it may concern:

Be it known that I, GLAnENcn Gr. CASH- MAN, a citizen of the United States, residing at Waynesboro, Franklin. county, and State of Pennsylvania, have invented anddiscovered certain new and useful llmprovements in Reamer-Heads, of-whichthe following is a specification.

My said invention consists in certain improvements in the details of construction and arrangement of parts of reamer heads of that type wherein the reamer blades are carried in radial seats and are radially adjustable, my improvements relating more particularly to the means of adjustably securing said reamer blades, whereby a very eflicient and easily operated tool of the character described is provided, all as will be;

more fully described. and

' by which a tool or wrench (not shown) hereinafter claimed. 1.

Referring ,to the accompanying drawings which are made a part hereof, and .on which similar reference characters indicate similar parts; Figure 1 is a side elevation of a Fig. 3 a face view, Fig.4 a cross section on the dotted line 14 in Fig. 2, Fig. 5 a cross-section. on the dotted line 5-5 in Fig. 2, and Fig. 6 a perspective view showing one of the reamer blades separately. In said drawings, the portions marked A represent the machine spindle on which the reamer head is mounted, 1B the body of said reamer head, and C the reamer blades.

'- adapted to receive and hold the reamer blades. Said seats or grooves are formed with bottoms inclined downward from rear to front, and the reamer blades are formed.

with complementary tapered inner edges.

Said seats are also provided with grooves in one side thereof. Said reamer blades (3' are of the form more clearly shown inFig. 6, having a longitudinal rib 0 along the lower edge, adapted to engage and interlock with the groove in the side of each seat to hold them from radial displacement;

the body B.

It consists of a cyl-- It is provided with Each reamer blade is formed with a shoulder 10 near its front end and another shoulder 11 at a point toward its rear end,

behind the solid part of forward end of Said blades are securely clamped by means of said shoulders, between the head 12 and a collar 13 on a screwthreaded member 14:, a friction washer 20 being preferably interposed between head 12 and the shoulders 10 of the blades. Said member 14': is mounted in a screw-threaded perforation centrally located in said head.

- A clamping nut 15 is mounted on the inner end of said screw-threaded member 14, adapted to operate against collar 13, and

a friction ring 16 is interposed between the shoulderll and said collar 13. Said screw, threaded member 14: is formed with a central socket 17 rectangular in cross-section,

may be inserted for turning the same.

The tool is assembled by placing the reamer blades in the seats or groovesprovided therefor in the head, with the ribs 0 in the recesses in the sides of said seats, and then clamping said reamer blades to the screw-threaded member '14: by the means just described. It will thus be seen that the turning of said member '14: will slide the reamer blades back and forth, and as they slide over the inclined floors of their seats or grooves, or are guided by the interlocking side connections, they will be drawn inwardly, or forced outwardly,'as the case" may be, by said formation.

Having thus fully described my said invention, what 1 claim as new and desire to a secure by Letters Patent, is:

1. A reamer head comprising a body formed with longitudinal grooves extending in a -radial direction into said body and spaced equidistant apart around its periphery, reamer blades mounted in .said grooves, said blades and the supports for their inner edges being formed so that relative longitudinal movement eflects radial adjustment of the blades, and a screwthreaded member mounted in a screwthreaded perforation in said body and clamped to said reamer blades, whereby the turning of. said screw-threaded member will operate to slide said reamer blades back an forth, substantially as set forth.

2. A reaming tool comprising a body formed with longitudinal grooves for the reamer blades, said grooves being formed with inclined supports, reamer blades mounted in said grooves with" inclined or tapered edges resting upon said supports,

and an adjustable member mounted in said body and clamped to said reamer blades,

substantially as set forth.

3. A reaming tool comprising a body formed with longitudinal grooves with inclined supports for the reamer blades, said reamer blades mounted to slide in said grooves on said supports, and a screwthreaded member mounted in said body and In witness whereof, I have hereunto set my hand and seal at Waynesboro, Pennsylvania, this nineteenth day of May, A. D. nineteen hundred and fifteen.

CLARENCE e. GASHMAN. a. 8-]

Witnesses:

VINCENT Hourr, ALF. N. Russmm. 

